How many flights depart from Region of Ontario to Missouri on average per week?

46 flights are operational weekly from Region of Ontario to Missouri as of May 2026. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.

What is the cheapest airline that flies from Ontario to Missouri?

Air Canada, United Airlines, and American Airlines are the most popular carriers operating from Ontario to Missouri

How many flights depart from Region of Ontario to Missouri on average per day?

As of May 2026, 6 flights take off from Region of Ontario and land in Missouri each day. The most common flight departure time for this route is 11:00a.m., with 50% of daily flights taking off at noon.

How long is the flight from Region of Ontario to Missouri?

The average flight duration from Region of Ontario to Missouri depends on which airport you fly into and out of. Flying from Toronto to St. Louis is 2h 06m on average, while flying from Ottawa to St. Louis is 5h 09m on average. St. Louis is the most popular airport in Missouri.

Which airlines fly to Missouri?

Air Canada, WestJet and United Airlines are the top three most popular airlines that fly to Missouri from Region of Ontario according to our data. Air Canada is the first choice among our users, with 38% of people opting to fly with this airline when travelling to Missouri. Keep in mind that there are 5 different airlines that fly to Missouri on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Ontario to Missouri?

Prices for flights from Ontario to Missouri are refreshed on a daily basis.

How many operators does momondo search for flights from Ontario to Missouri?

There are 5 operators available for flights from Ontario to Missouri as of May 2026.

How old do you have to be to fly from Ontario to Missouri?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Missouri.

What documentation or ID do you need to fly to Missouri?

The necessary travel and health documents for your Missouri trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

C$ 258 Cheap Flights from Ontario to Missouri in 2026

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Find the cheapest flights from Ontario to Missouri

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 p.m. - 11:37 p.m.

YOW

STL

6h 37m

1 stop

5:32 p.m. - 9:56 a.m.

STL

YOW

15h 24m

2 stops

C$ 464United Airlines

Fri, 11 Sep - Mon, 14 Sep

6:25 a.m. - 3:46 p.m.

YOW

STL

10h 21m

1 stop

6:00 a.m. - 9:35 p.m.

STL

YOW

14h 35m

1 stop

C$ 479United Airlines

Thu, 9 Jul - Sat, 11 Jul

7:25 a.m. - 2:02 p.m.

YYZ

STL

7h 37m

1 stop

1:42 p.m. - 11:29 p.m.

STL

YYZ

8h 47m

1 stop

C$ 479American Airlines

Wed, 10 Jun - Wed, 24 Jun

3:10 p.m. - 11:35 p.m.

YOW

STL

9h 25m

1 stop

12:55 p.m. - 6:48 p.m.

STL

YOW

4h 53m

1 stop

C$ 481United Airlines

Wed, 3 Jun - Sat, 6 Jun

2:35 p.m. - 6:42 p.m.

YOW

STL

5h 07m

1 stop

8:55 a.m. - 3:10 p.m.

STL

YOW

5h 15m

1 stop

C$ 489Air Canada

Wed, 26 Aug - Sun, 30 Aug

7:25 a.m. - 2:02 p.m.

YYZ

STL

7h 37m

1 stop

1:25 p.m. - 11:29 p.m.

STL

YYZ

9h 04m

1 stop

C$ 512American Airlines

Tue, 16 Jun - Tue, 7 Jul

2:40 p.m. - 8:25 p.m.

YOW

STL

6h 45m

1 stop

1:13 p.m. - 1:36 a.m.

STL

YOW

11h 23m

2 stops

C$ 562Air Canada

Wed, 3 Jun - Sat, 6 Jun

6:51 p.m. - 11:59 p.m.

YUL

STL

6h 08m

1 stop

1:27 p.m. - 11:57 p.m.

STL

YUL

9h 30m

1 stop

C$ 626Delta

Fri, 29 May - Mon, 1 Jun

6:15 a.m. - 7:17 p.m.

YYZ

MCI

14h 02m

2 stops

12:39 p.m. - 11:14 p.m.

MCI

YYZ

9h 35m

1 stop

C$ 770Delta

Tue, 16 Jun - Thu, 18 Jun

6:15 a.m. - 11:11 a.m.

YYZ

SGF

5h 56m

1 stop

3:30 p.m. - 9:58 p.m.

SGF

YYZ

5h 28m

1 stop

C$ 960WestJet

Sat, 24 Oct - Wed, 28 Oct

Air Canada flights from Region of Ontario to Missouri

Our best Air Canada deals on Region of Ontario to Missouri flight tickets

Air Canada

26 Aug

YOW2:35 p.m.Ottawa

5h 07m

1 stop

STL6:42 p.m.Lambert-St Louis

30 Aug

STL8:55 a.m.Lambert-St Louis

5h 15m

1 stop

YOW3:10 p.m.Ottawa

C$ 489

Air Canada

3 Jun

YOW2:40 p.m.Ottawa

6h 45m

1 stop

STL8:25 p.m.Lambert-St Louis

6 Jun

STL1:13 p.m.Lambert-St Louis

11h 23m

2 stops

YOW1:36 a.m.Ottawa

C$ 562

Air Canada

3 Jun

YOW9:55 a.m.Ottawa

6h 51m

2 stops

STL3:46 p.m.Lambert-St Louis

6 Jun

STL1:13 p.m.Lambert-St Louis

11h 23m

2 stops

YOW1:36 a.m.Ottawa

C$ 566

Delta flights from Region of Ontario to Missouri

Our best Delta deals on Region of Ontario to Missouri flight tickets

Delta

12 Jun

YYZ2:29 p.m.Toronto Pearson Intl

7h 10m

1 stop

STL8:39 p.m.Lambert-St Louis

15 Jun

STL6:10 p.m.Lambert-St Louis

3h 52m

1 stop

YYZ11:02 p.m.Toronto Pearson Intl

C$ 625

Delta

28 May

YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl

8h 10m

1 stop

STL1:10 p.m.Lambert-St Louis

1 Jun

STL5:20 p.m.Lambert-St Louis

5h 37m

1 stop

YUL11:57 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 626

Delta

9 Jul

YYZ1:38 p.m.Toronto Pearson Intl

9h 37m

1 stop

STL10:15 p.m.Lambert-St Louis

12 Jul

STL6:30 a.m.Lambert-St Louis

7h 50m

1 stop

YYZ3:20 p.m.Toronto Pearson Intl

C$ 647

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 11/9

6:00 p.m.-11:37 p.m.

1 stop6h 37m

Lambert-St Louis

Mon 14/9

5:32 p.m.-9:56 a.m.

2 stops15h 24m

C$ 464

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 9/7

6:25 a.m.-3:46 p.m.

1 stop10h 21m

Lambert-St Louis

Sat 11/7

6:00 a.m.-9:35 p.m.

1 stop14h 35m

C$ 479

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 10/6

7:25 a.m.-2:02 p.m.

1 stop7h 37m

Lambert-St Louis

Wed 24/6

1:42 p.m.-11:29 p.m.

1 stop8h 47m

C$ 479

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Wed 3/6

3:10 p.m.-11:35 p.m.

1 stop9h 25m

Lambert-St Louis

Sat 6/6

12:55 p.m.-6:48 p.m.

1 stop4h 53m

C$ 481

Quickest round-trip

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Wed 26/8

2:35 p.m.-6:42 p.m.

1 stop5h 07m

Lambert-St Louis

Sun 30/8

8:55 a.m.-3:10 p.m.

1 stop5h 15m

C$ 489

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 16/6

7:25 a.m.-2:02 p.m.

1 stop7h 37m

Lambert-St Louis

Tue 7/7

1:25 p.m.-11:29 p.m.

1 stop9h 04m

C$ 512

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Wed 3/6

2:40 p.m.-8:25 p.m.

1 stop6h 45m

Lambert-St Louis

Sat 6/6

1:13 p.m.-1:36 a.m.

2 stops11h 23m

C$ 562

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 29/5

6:51 p.m.-11:59 p.m.

1 stop6h 08m

Lambert-St Louis

Mon 1/6

1:27 p.m.-11:57 p.m.

1 stop9h 30m

C$ 626

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Tue 16/6

6:15 a.m.-7:17 p.m.

2 stops14h 02m

Kansas City

Thu 18/6

12:39 p.m.-11:14 p.m.

1 stop9h 35m

C$ 770

TorontoSpringfield

YYZ - SGF

YYZSGF

Toronto Pearson Intl

Sat 24/10

6:15 a.m.-11:11 a.m.

1 stop5h 56m

Springfield-Branson

Wed 28/10

3:30 p.m.-9:58 p.m.

1 stop5h 28m

C$ 960

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Region of Ontario to Missouri

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Missouri?

The month of December is, on average, the cheapest month to fly to Missouri from Region of Ontario, with most prices found around C$ 230. If you are unable to visit Missouri during the month of December, then departing from Region of Ontario during the month October is also very affordable. Most momondo users find prices during this month for around C$ 240.

What is the cheapest day to depart on your flight to Missouri?

Our data shows that Saturday is the least expensive day to fly to Missouri. Tickets to fly out on this day can be as low as C$ 578. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 980. These prices are subject to change though, so be sure to set up a Price Alert for flights to Missouri.

What is the cheapest time of day to depart on your flight to Missouri?

Our data shows that the cheapest Region of Ontario to Missouri flights are usually those with departure times in the morning. Our users have found flights to Missouri in the morning for as low as C$ 575. In the afternoon is when there is more demand to fly to Missouri, so prices are often more expensive at around C$ 711 per ticket.

What is the cheapest Ontario to Missouri flight route?

Fly from Toronto Pearson Intl to Lambert-St Louis for the best Ontario - Missouri flight prices

How far in advance should I book a flight from Ontario to Missouri?

You are more likely to see cheaper flights to Missouri from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Missouri for around C$ 679 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missouri from Region of Ontario for as low as C$ 492 on momondo.

Can stopping save me money on Region of Ontario to Missouri flights?

No. A direct flight is the cheapest option for a flight between Region of Ontario to Missouri.

Cheap Region of Ontario to Missouri flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Missouri

Best price found	C$ 324
Fastest flight time	2h 06m
Direct flights	Every day
Airports in Missouri	55 airports

The best one-way flight to Missouri from Region of Ontario in the past 72 hours is C$ 324. The best round-trip flight deal from Region of Ontario to Missouri found on momondo in the last 72 hours is C$ 575.

The fastest flight from Region of Ontario to Missouri takes 2h 06m

Direct flights go from Region of Ontario to Missouri every day.

There are 55 airports in Missouri. From Region of Ontario there are direct flights to Lambert-St Louis (STL).

Search flight deals

Frequently asked questions about flying from Ontario to Missouri

When did momondo last update prices for flights from Ontario to Missouri?
Prices for flights from Ontario to Missouri are refreshed on a daily basis.
How many operators does momondo search for flights from Ontario to Missouri?
There are 5 operators available for flights from Ontario to Missouri as of May 2026.
How old do you have to be to fly from Ontario to Missouri?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Missouri.
What documentation or ID do you need to fly to Missouri?
The necessary travel and health documents for your Missouri trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Region of Ontario to Missouri?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Region of Ontario to Missouri is Embraer 175 (41.67% of total bookings). The next most popular plane models are Canadair (Bombardier) Regional Jet 900 (25.00%), Airbus A220-300 (19.17%), and Airbus A319 (5.00%).

Best airlines flying from Region of Ontario to Missouri

Compare and see reviews for airlines that fly from Region of Ontario to Missouri with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom C$ 335	Free Cancellation	Rating 7.4 9,711 reviews	Search United Airlines flights
American Airlines	PriceFrom C$ 362	Free Cancellation	Rating 7.1 11,664 reviews	Search American Airlines flights
Air Canada	PriceFrom C$ 403	Free Cancellation	Rating 7.1 11,034 reviews	Search Air Canada flights
Delta	PriceFrom C$ 471	Free Cancellation	Rating 7.9 8,452 reviews	Search Delta flights
WestJet	PriceFrom C$ 553	Free Cancellation	Rating 7.2 3,335 reviews	Search WestJet flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Missouri?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Missouri from Ontario.

Can I find flights from Ontario to Missouri with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ontario to Missouri flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to Missouri?

Once all potential Ontario to Missouri flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Missouri right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to Missouri flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Popular Cities in Missouri

Flights to Fort Lauderdalefrom C$ 230

Flights to Orlandofrom C$ 279

Flights to New Yorkfrom C$ 304

Flights to Los Angelesfrom C$ 219

Flights to Las Vegasfrom C$ 299

Flights to Miamifrom C$ 364

Flights to San Franciscofrom C$ 267

Flights to Honolulufrom C$ 453

Flights to Phoenixfrom C$ 301

Flights to Tampafrom C$ 251

Flights to Chicagofrom C$ 270

Flights to Houstonfrom C$ 385

Cheap flights from Ontario to Missouri from C$ 258

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Missouri departing on 16/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names, great deals

Filter for what you want

Filter for what you want

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Air Canada flights from Region of Ontario to Missouri

Our best Air Canada deals on Region of Ontario to Missouri flight tickets

Delta flights from Region of Ontario to Missouri

Our best Delta deals on Region of Ontario to Missouri flight tickets

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How to get the cheapest flight ticket from Region of Ontario to Missouri

What is the cheapest month to fly to Missouri?

What is the cheapest day to depart on your flight to Missouri?

What is the cheapest time of day to depart on your flight to Missouri?

What is the cheapest Ontario to Missouri flight route?

How far in advance should I book a flight from Ontario to Missouri?

Can stopping save me money on Region of Ontario to Missouri flights?

What is the cheapest airline that flies from Ontario to Missouri?

Which airlines fly to Missouri?

How many flights depart from Region of Ontario to Missouri on average per day?

How many flights depart from Region of Ontario to Missouri on average per week?

How long is the flight from Region of Ontario to Missouri?

Cheap Region of Ontario to Missouri flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Missouri

Best price found

Fastest flight time

Direct flights

Airports in Missouri

Frequently asked questions about flying from Ontario to Missouri

Best airlines flying from Region of Ontario to Missouri

Compare and see reviews for airlines that fly from Region of Ontario to Missouri with momondo

Why use momondo?

An easier way to manage your Missouri trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Missouri

Popular Cities in Missouri

Popular flights according to clicks in the last 7 days on momondo

Region of Ontario flight routes

According to popular flight searches on momondo this year

Missouri flight routes

According to popular flight searches on momondo this year

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